Systematic Parasitology最新文献

First record of Picobiinae mites (Acariformes: Syringophilidae) parasitising potoos (Aves: Nyctibiiformes), with description of a new species. 首次记录拟螨科（蜱螨目：嗜针螨科）寄生于蝇类（蝇目：嗜针螨目），并描述了一新种。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-04-15 DOI: 10.1007/s11230-026-10274-y

Maciej Skoracki, Milena Patan, Till Töpfer, Martin Hromada, Bozena Sikora

{"title":"First record of Picobiinae mites (Acariformes: Syringophilidae) parasitising potoos (Aves: Nyctibiiformes), with description of a new species.","authors":"Maciej Skoracki, Milena Patan, Till Töpfer, Martin Hromada, Bozena Sikora","doi":"10.1007/s11230-026-10274-y","DOIUrl":"10.1007/s11230-026-10274-y","url":null,"abstract":"Quill mites of the subfamily Picobiinae (Acariformes: Syringophilidae) are permanent ectoparasites living within the quills of feathers. Currently, the genus Gunabopicobia comprises eight described species that primarily infest pigeons and doves (Columbiformes), except for one species reported from birds-of-paradise (Passeriformes). In this study, we present the first record of Gunabopicobia parasitising potoos (Nyctibiiformes). Specimens of G. nyctibiae Skoracki & Patan n. sp. were collected from the Long-tailed Potoo Nyctibius aethereus in Brazil and the Common Potoo Nyctibius griseus in Colombia and Paraguay. The finding indicates an unusual host shift between phylogenetically distant avian clades. Moreover, the new species was found inhabiting the quills of small wing coverts, an atypical microhabitat within the Picobiinae subfamily, further suggesting the ecological flexibility of the Gunabopicobia lineage. This discovery has important implications for understanding host associations and ecological diversification within Picobiinae and highlights the need to re-evaluate host specificity patterns in the genus Gunabopicobia.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13079485/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147693540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New species of Kudoa Meglitsch, 1947 (Cnidaria: Myxozoa) infecting the swim bladder musculature of Batrachoides surinamensis (Bloch & Shneider) (Batracoidiformes: Batrachoididae). Kudoa Meglitsch, 1947（刺胞纲：粘虫纲）侵染苏氏蝙蝠（Batrachoides surinamensis (Bloch & schneider)）鱼鳔肌肉的新种（蝙蝠类目：蝙蝠科）。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-04-06 DOI: 10.1007/s11230-026-10269-9

Jhonata Eduard, Maria Eduarda Soares da Silva, Maria Alzirene de Souza Ferreira, José Ledamir Sindeaux-Neto, Michele Velasco, Evonnildo Costa Gonçalves

{"title":"New species of Kudoa Meglitsch, 1947 (Cnidaria: Myxozoa) infecting the swim bladder musculature of Batrachoides surinamensis (Bloch & Shneider) (Batracoidiformes: Batrachoididae).","authors":"Jhonata Eduard, Maria Eduarda Soares da Silva, Maria Alzirene de Souza Ferreira, José Ledamir Sindeaux-Neto, Michele Velasco, Evonnildo Costa Gonçalves","doi":"10.1007/s11230-026-10269-9","DOIUrl":"10.1007/s11230-026-10269-9","url":null,"abstract":"The genus Kudoa is an important group of parasites within the class Myxozoa, as some species infect a wide range of fish hosts and cause post-mortem myoliquefaction, resulting in significant economic losses. This study describes a new species of Kudoa in toadfish Batrachoides surinamensis. In 60 % of specimens of B. surinamensis collected in the eastern Amazon, elongated white plasmodia were observed in the swim bladder muscle. Subquadrate myxospores measuring 5.6 µm in length, 7.5 µm in width, and 5.5 µm in thickness were recorded, with four polar capsules measuring 2.5 µm in length and 1.5 µm in width. Morphologically and morphometrically, these myxospores differ from those of other Kudoa species found in Amazonian fish. Histopathological analysis revealed that compression caused by plasmodia in muscle fibers, although no inflammatory infiltrates were observed. The Small subunit ribosomal (SSU) DNA sequence showed 97% similarity with a p-distance of 1.3% from K. viseuensis. In phylogeny, the new species formed a subclade with the species described in the Brazilian Amazon that infects fish from both marine and freshwater environments. The novel infection site, along with the morphological and molecular characteristics, supports the designation of a new species infecting the swim bladder musculature of B. surinamensis.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13053463/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147624768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new genus and new species of endoparasite (Isopoda, Entoniscidae, Diogenioninae) from the hermit crab Diogenes izanamiae in southwestern Japan. 日本西南部寄居蟹寄居蟹科寄居蟹内寄生虫一新属新种（等足目，寄居蟹科，寄居蟹科）。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-04-06 DOI: 10.1007/s11230-026-10270-2

Haruki Shinoda, Naoto Takiyama, Hiroki Fujita, Tomoyuki Nakano, Michitaka Shimomura

{"title":"A new genus and new species of endoparasite (Isopoda, Entoniscidae, Diogenioninae) from the hermit crab Diogenes izanamiae in southwestern Japan.","authors":"Haruki Shinoda, Naoto Takiyama, Hiroki Fujita, Tomoyuki Nakano, Michitaka Shimomura","doi":"10.1007/s11230-026-10270-2","DOIUrl":"10.1007/s11230-026-10270-2","url":null,"abstract":"Species of Entoniscidae are endoparasitic isopods that parasitize a variety of decapod crustaceans. Entoniscid parasites of the subfamily Diogenioninae, which was represented by a monotypic genus, are a small group of endoparasites of hermit crabs and have previously been reported only from the Red Sea and the Philippines. During a survey of the subtidal zone at Usa, Kochi, southwestern Japan, an undescribed species of the subfamily was discovered inhabiting the visceral cavity of the hermit crab Diogenes izanamiae Asakura, 2006. Detailed morphological examination revealed that this species differs from the sole species in the only previously known genus of the subfamily, Diogenion, in having a brood pouch formed by overlapping oostegites 1-7 and in possessing uniramous pleopods on pleomeres 1-4 in females. On the basis of these diagnostic characters, a new genus and species, Paradiogenion japonica n. gen., n. sp., are established and described herein, based on adult females, males, and epicaridium larvae. The new genus exhibits several primitive morphological characters and is considered the ancestral taxon within Entoniscidae. This study represents the first record of Diogenioninae, as well as of entoniscid isopods parasitizing hermit crabs, from Japan and provides a key to understanding the parasitic adaptations of the family Entoniscidae.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147624809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New host-parasite relationship: Rocinela signata (Aegidae: Isopoda: Crustacea) found in green sea turtles in Brazil. 新的寄主-寄生虫关系：在巴西绿海龟中发现的signata（盾科：等足目：甲壳纲）。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-03-24 DOI: 10.1007/s11230-025-10266-4

Thabata Fernanda Oliveira, Camila Miguel, Tammy Iwasa-Arai

{"title":"New host-parasite relationship: Rocinela signata (Aegidae: Isopoda: Crustacea) found in green sea turtles in Brazil.","authors":"Thabata Fernanda Oliveira, Camila Miguel, Tammy Iwasa-Arai","doi":"10.1007/s11230-025-10266-4","DOIUrl":"10.1007/s11230-025-10266-4","url":null,"abstract":"Associations between isopods and sea turtles are rarely documented. Here we report, to our knowledge, the first record of aegid isopods parasitizing sea turtles: Rocinela signata Schiödte & Meinert, 1879 and Rocinela sp. on juvenile green sea turtles, Chelonia mydas (Linnaeus), in the Santa Cruz Wildlife Refuge, Espírito Santo, Brazil. Between 2021 and 2023, 322 juveniles underwent morphometric and health assessments, including scoring of epibionts and ectoparasites. In total, 142 turtles (44.1%) presented fibropapillomatosis (FP). Five R. signata were found attached to fibropapillomas on five different turtles, and two specimens of Rocinela sp. were collected from two FP-free turtles-one attached to the neck and one to the eye. The consistent localization of R. signata on FP lesions suggests these tumors provide a favorable microhabitat, potentially via shelter and access to vascularized tissue. Given the capacity for R. signata to remain attached for prolonged periods, we hypothesize that R. signata may establish persistent parasitic associations with sea turtles and merits investigation as a potential vector of chelonid herpesvirus 5 (ChHV5). We discuss the possibility that post-disaster environmental stressors following the 2015 Fundão tailings dam collapse contributed to conditions favoring this novel host-parasite interaction.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13013138/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147516815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Eimeria akrurensis n. sp. (Apicomplexa: Eimeriidae), a New Coccidian Parasite from the Domestic Goat (Capra hircus) in Dharashiv (Previously Osmanabad), India. 印度Dharashiv（原Osmanabad）家山羊（Capra hircus）的一种新的球虫寄生虫akrureneimeria n. sp.（顶复体：艾美耳虫科）。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-02-19 DOI: 10.1007/s11230-026-10268-w

Tejswini Sontakke, Ashwini Biradar, Dinesh Nalage, Vidya Pradhan

{"title":"Eimeria akrurensis n. sp. (Apicomplexa: Eimeriidae), a New Coccidian Parasite from the Domestic Goat (Capra hircus) in Dharashiv (Previously Osmanabad), India.","authors":"Tejswini Sontakke, Ashwini Biradar, Dinesh Nalage, Vidya Pradhan","doi":"10.1007/s11230-026-10268-w","DOIUrl":"10.1007/s11230-026-10268-w","url":null,"abstract":"Coccidiosis caused by Eimeria species remains a significant protozoan disease affecting the health and productivity of small ruminants. During a faecal survey of domestic goats (Capra hircus) conducted in Dharashiv (Previously Osmanabad) District, Maharashtra, India (June 2013-May 2015), a new Eimeria species was identified and described. A total of 3,004 fecal samples were examined, of which 2,473 samples were positive for coccidian infection. Among these, 261 samples were found positive for the new species (Eimeria akrurensis n. sp.), with an overall prevalence of 10.6%. The oocysts of E. akrurensis n. sp. are subspherical to elongate, bilayered, and measure 23.0 × 20.5 µm (range: 19.0-27.0 × 17.0-24.0 µm) with an L/W ratio of 1.12. The oocysts possess a distinct micropyle (2.0-4.0 µm wide) and micropylar cap (1.0-2.0 µm high × 2.0-4.0 µm wide), but lack an oocyst residuum; two or more polar granules are present. Sporocysts are ovoid, 10.5 × 7.5 µm, with a prominent Stieda body and a few scattered granules forming the oocyst residuum. In potassium dichromate, sporulation occurs within 60-90 hours at 24-26°C in samples. The new species differs from Eimeria crandallis and Eimeria hirci by its subspherical shape, smaller micropyle and micropylar cap, and prominent Stieda body. This discovery adds to the known diversity of caprine coccidia and contributes to the understanding of host-specific Eimeria spp. fauna in the semi-arid region of Maharashtra, India.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 2","pages":"9"},"PeriodicalIF":1.2,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146229718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reorganisation of the turtle blood fluke genera Hapalotrema and Learedius (Trematoda: Hapalotrematidae), with the proposal of two new genera, a new species, and comments on population structure. 甲鱼血吸虫属和甲鱼血吸虫属（吸虫目：甲鱼血吸虫科）的重组，提出了2个新属、1个新种，并对种群结构进行了评述。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-02-19 DOI: 10.1007/s11230-025-10256-6

Richard D Corner, Thomas H Cribb, Scott C Cutmore

{"title":"Reorganisation of the turtle blood fluke genera Hapalotrema and Learedius (Trematoda: Hapalotrematidae), with the proposal of two new genera, a new species, and comments on population structure.","authors":"Richard D Corner, Thomas H Cribb, Scott C Cutmore","doi":"10.1007/s11230-025-10256-6","DOIUrl":"10.1007/s11230-025-10256-6","url":null,"abstract":"Hapalotrematid trematodes are by far the most commonly reported species of blood flukes infecting marine turtles. Species of this family infect a wide range of organs in their hosts, but are most often reported from the heart and associated major blood vessels. Although commonly encountered, there remain issues surrounding the genus-level characterisation within the family. Previous phylogenetic studies have shown that the genera Hapalotrema Looss, 1899 and Learedius Price, 1934 do not adequately represent the relationships of their associated species, with species of Learedius routinely falling among those of Hapalotrema. Here, we use morphological and multi-locus molecular data to resolve the paraphyly of Hapalotrema by proposing two new genera. Additionally, we describe a new species, examine the population structure hapalotrematids with cox1 mtDNA data, and report the first infection of an adult turtle blood fluke from the olive ridley sea turtle. We show that the level of genetic variation differs significantly between species, and multiple populations of hapalotrematid morphospecies exist along the coast of southeast Queensland, Australia. Finally, the phylogenetic affinities of Amphiorchis solus (Simha & Chattopadhyaya, 1970) Platt, 2002 in relation to the other species of the Hapalotrematidae is elucidated.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 2","pages":"10"},"PeriodicalIF":1.2,"publicationDate":"2026-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146229754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Annulotrema spp. (Monogenea: Dactylogyridae) from Characiformes of Cameroon: additional morphological observations and proposal of a new morphogroup. 喀麦隆特征的环蝽属（单属：趾蝽科）：附加形态学观察和一个新形态群的提出。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-02-06 DOI: 10.1007/s11230-025-10264-6

Tombi Jeannette, Ndongo Ivan, Onana Ngono Michel Thierry, Akoumba John Francis, Fomena Abraham

{"title":"Annulotrema spp. (Monogenea: Dactylogyridae) from Characiformes of Cameroon: additional morphological observations and proposal of a new morphogroup.","authors":"Tombi Jeannette, Ndongo Ivan, Onana Ngono Michel Thierry, Akoumba John Francis, Fomena Abraham","doi":"10.1007/s11230-025-10264-6","DOIUrl":"10.1007/s11230-025-10264-6","url":null,"abstract":"The study of the monogenean fauna of Brycinus kingsleyae, Brycinus macrolepidotus, Phenacogrammus major and Hepsetus odoe, four characiform fishes consumed in Cameroon allowed to find seven species of Annulotrema Paperna and Thurston, 1969 and provided new information for the diagnosis of these helminths. Concerning the parasites of Brycinus kingsleyae: in Annulotrema combesi Birgi, 1988, the copulatory tube can make two turns of spire contrary to the initial description which indicates a single turn; on the dorsal bar of Anulotrema maillardi Birgi, 1988, a sclerotized structure was observed for the first time; a loop was also noted for the first time on the ventral bar of Annulotrema nyongesnsis Birgi, 1988. For parasites of Phenacogrammus major, the vagina was observed for the first time in Annulotrema gabrioni Birgi, 1988. A membrane extension never reported on the dorsal transverse bar of Annulotrema hepseti Paperna and Thurston, 1969, a parasite of Hepsetus odoe was observed during this study. Principal Component Analysis (PCA) allowed the assignment of a morphogroup to the two recently described species in Brycinus macrolepidotus. Thus, a new morphogroup named Ngombiensis n. gr. was created to classify Annulotrema ngombiensis Ndongo and Tombi, 2023. As for Annulotrema nkengfacki Ndongo and Tombi, 2023, its morphometric characteristics allow it to be associated with the Nyongensis group created by Birgi in 1988.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 1","pages":"8"},"PeriodicalIF":1.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146133593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two new species of diplectanid monogeneans infecting Malabar grouper Epinephelus malabaricus and orange-spotted grouper E. coioides cultured on Ishigaki Island, Okinawa, Japan. 在日本冲绳石垣岛养殖的马拉巴石斑鱼和橙斑石斑鱼两种感染马拉巴石斑鱼的双系单基因新种。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-02-06 DOI: 10.1007/s11230-026-10267-x

Kazuo Ogawa, Misaki Yamauchi, Tsukasa Waki, Sang Phil Shin, Sho Shirakashi

{"title":"Two new species of diplectanid monogeneans infecting Malabar grouper Epinephelus malabaricus and orange-spotted grouper E. coioides cultured on Ishigaki Island, Okinawa, Japan.","authors":"Kazuo Ogawa, Misaki Yamauchi, Tsukasa Waki, Sang Phil Shin, Sho Shirakashi","doi":"10.1007/s11230-026-10267-x","DOIUrl":"10.1007/s11230-026-10267-x","url":null,"abstract":"Descriptions are given for two new diplectanid monogeneans, Cryptoplectanum ishigakiense n. g., n. sp. collected from Malabar grouper Epinephelus malabaricus (Bloch & Schneider) and orange-spotted grouper Epinephelus coioides (Hamilton), and Pseudorhabdosynochus yaito n. sp. from E. malabaricus, both cultured on Ishigaki Island, Okinawa, Japan. Cryptoplectanum n. g. differs from its most similar genus Pseudorhabdosynochus Yamaguti, 1958 by having an unsclerotized vagina and lacking a quadriloculate organ. Cryptoplectanum ishigakiense n. sp. differs from its most similar species Diplectanum maa Justine & Sigura, 2007 by possessing a small, funnel-shaped penis and tegumental scales in posterior body, whereas D. maa has a larger, spoon-shaped penis and lacks tegumental scales. Pseudorhabdosynochus yaito n. sp. is most similar to P. manifestus Justine & Sigura, 2007, but can be differentiated by the shape of the quadriloculate organ; in the new species, all chambers are of equal width and equally sclerotized, while in P. manifestus the chambers became gradually narrower toward the cone and the fourth chamber is more heavily sclerotized than the anterior three. Molecularly, C. ishigakiense n. sp. forms a clade with Diplectanum grouperi Bu, Leong, Wong, Woo & Foo, 1999, both constituting a lineage closely related to the main Pseudorhabdosynochus clades. Both D. maa and D. grouperi possess the penis and vagina characteristic of the newly proposed genus Cryptoplectanum, and thus are assigned to Cryptoplectanum maa n. comb. and C. grouperi n. comb., respectively.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 1","pages":"7"},"PeriodicalIF":1.2,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146133510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rhizorhina hamatipedicola n. sp. (Copepoda: Siphonostomatoida: Nicothoidae) parasitic on a tanaidacean crustacean, with a note on the effectiveness of COI and 18S data in Rhizorhina taxonomy. （桡足目：吸气孔目：烟蛾科）寄生于一根线虫纲甲壳类动物上，兼论COI和18S数据在根线虫分类中的有效性。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-01-21 DOI: 10.1007/s11230-025-10265-5

K Kakui

{"title":"Rhizorhina hamatipedicola n. sp. (Copepoda: Siphonostomatoida: Nicothoidae) parasitic on a tanaidacean crustacean, with a note on the effectiveness of COI and 18S data in Rhizorhina taxonomy.","authors":"K Kakui","doi":"10.1007/s11230-025-10265-5","DOIUrl":"10.1007/s11230-025-10265-5","url":null,"abstract":"A new nicothoid copepod species Rhizorhina hamatipedicola n. sp. is described, parasitic on the tanaidacean Hamatipeda kohtsukai Kakui & Hiruta (Hamatipedidae) collected at depths of 360-375 m in Sagami Bay, Japan, in the northwestern Pacific. It closely resembles Rhizorhina aesthetes Boxshall & Harrison, 1988 parasitic on an ischnomesid isopod collected at a depth of about 2910 m in the northeastern Atlantic, and Rhizorhina ohtsukai Kakui, 2016 parasitic on the leptocheliid tanaidacean Chondrochelia sublitoralis Sato, Arakawa, & Kakui collected at depths of 151-136 m in the northwestern Pacific. Although there are only minor morphological differences between these Rhizorhina species, their hosts differ at the level of order or family. The known geographical and depth distributions of R. hamatipedicola differ greatly from those of R. aesthetes. A partial nucleotide sequence of the 18S rRNA (18S) gene from R. hamatipedicola was identical to that from R. ohtsukai, but the two species differed by 13.4% and 14.9% p- and K2P distances, respectively, for the cytochrome c oxidase subunit I (COI) gene, which were much greater than intraspecific distances previously reported in Siphonostomatoida. This study suggests that an integrative approach combining morphology, sequences of COI or other genes evolving faster than 18S, and host data is necessary to reliably distinguish among morphologically similar Rhizorhina species.","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"103 1","pages":"6"},"PeriodicalIF":1.2,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146013364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new species of Telenomus Haliday (Hymenoptera: Scelionidae) and a novel host association with Creatonotos transiens (Walker) (Lepidoptera: Erebidae) in India. 文章标题印度小蜂一新种（膜翅目：小蜂科）及其新寄主群（鳞翅目：小蜂科）。

IF 1.2 4区医学

Systematic Parasitology Pub Date : 2026-01-17 DOI: 10.1007/s11230-025-10263-7

Rupam Debnath, K Rajmohana, K P Dinesh

引用次数: 0